Conveyance seat

ABSTRACT

Provided is a conveyance seat in which a duct connected to a fan can be compactly disposed, and the fan is provided in a pan-frame-type seat cushion. The vehicle seat includes a seat cushion (S2) and a blower (48) provided in the seat cushion (S2). The seat cushion (S2) is provided with a plate-shaped pan frame (42). The blower (48) is provided below the pan frame (42), a duct (49) is connected to the blower (48), and an opening (42a) through which the duct (49) extends is formed in the pan frame (42).

TECHNICAL FIELD

The present invention relates to a conveyance seat, and particularly toa conveyance seat including a blower.

BACKGROUND ART

Some seat cushions of conveyance seats including vehicle seats, etc.include a plate-shaped pan frame.

For example, Patent Literature 1 describes an invention relating to apan frame provided in a seat cushion that constitutes a vehicle seat,characterized in that a bead is formed on the pan frame in order toincrease strength.

CITATION LIST Patent Literature

PATENT LITERATURE 1: JP 2001-145537 A

SUMMARY OF INVENTION Technical Problem

In some vehicle seats for luxury vehicles, in order to provide comfortto a seat occupant, a fan such as a blower for sending air toward theseat occupant is provided in the interior thereof.

However, in the seat cushion provided with the pan frame described inPatent Literature 1, in order to blow air toward the seat occupant, itis necessary to dispose a fan on the pan frame. Therefore, in order toensure the region for disposing the fan, it was necessary to increasethe height of seat cushion.

In addition, when the fan is disposed on the side of the seat occupantwith respect to the pan frame in this way, vibration accompanying theoperation of the fan is easily transmitted to the seat occupant, and thevibration may provide discomfort to the seat occupant.

Furthermore, it takes time to attach a harness for supplying power tothe fan to the seat cushion, resulting in a lot of time to attach thefan and the harness.

The present invention has been made in view of the above problems, andan object thereof is to provide a conveyance seat in which a ductconnected to a fan can be compactly arranged, and a pan-frame-type seatcushion is provided with a fan.

Another object of the present invention is to prevent the vibration ofthe fan from being transmitted to a seat occupant.

Another object of the present invention is to easily fix a harness to abracket.

Solution to Problem

According to a conveyance seat of the present invention, the aboveproblem is solved by a conveyance seat including a seat cushion and afan provided in the seat cushion, wherein the seat cushion is providedwith a plate-shaped pan frame, the fan is provided below the pan frame,a duct is connected to the fan, and an opening through which the ductextends is formed in the pan frame.

In the above configuration, the opening through which the duct extendsis formed in the pan frame provided in the conveyance seat. Therefore,it is possible to provide a conveyance seat in which the duct connectedto the fan can be compactly arranged, and a pan-frame-type seat cushionis provided with the fan.

Preferably, the duct has a bellows shape including a recess and aprotrusion that are formed continuously in one direction, and the recessof the bellows shape is arranged so as to overlap the opening of the panframe in the one direction.

According to the above configuration, since the recess of the ducthaving a bellows shape is arranged so as to overlap the opening of thepan frame, it is possible to prevent the duct from coming off the panframe.

Preferably, a bracket for disposing the fan in the seat cushion isfurther provided, the bracket includes a main body portion formed at aposition separated from the pan frame with the bracket being attached tothe pan frame, and attachment portions attached to the pan frame, andthe fan is attached to the main body portion of the bracket.

According to the above configuration, since the fan is attached to themain body portion of the bracket and is attached to the pan frame viathe bracket, it is possible to prevent the vibration of the fan frombeing transmitted to the seat occupant.

Preferably, an opening through which the duct extends is formed in thebracket.

According to the above configuration, since the opening through whichthe duct extends is formed in the bracket, it is possible to prevent thearrangement of the duct from being restricted by the bracket.

Preferably, a harness is connected to the fan, a clip is attached to theharness, and a fixing portion for fixing the clip is provided in thebracket.

According to the above configuration, since the fixing portion forfixing the clip of the harness is provided in the bracket, it ispossible to easily and stably fix the harness to the bracket.

Advantageous Effects of Invention

According to this invention, it is possible to provide a conveyance seatin which the duct connected to the fan can be compactly arranged, and apan-frame-type seat cushion is provided with a fan.

Furthermore, according to the present invention, it is possible toprevent the duct from coming off the pan frame.

Furthermore, according to the present invention, it is possible toprevent the vibration of the fan from being transmitted to the seatoccupant.

Furthermore, according to the present invention, it is possible toprevent the arrangement of the duct from being restricted by thebracket.

Furthermore, according to the present invention, it is possible toeasily and stably fix the harness to the bracket.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view of a vehicle seat according to thisembodiment.

FIG. 2A is a perspective view showing a frame constituting a frameworkof a vehicle seat.

FIG. 2B is a perspective view showing a frame constituting a frameworkof a seat cushion.

FIG. 3 is a sectional view showing the arrangement of a blower, abracket, and a duct in the seat cushion, showing a cross section takenalong the line III-III of FIG. 1.

FIG. 4 is a perspective view showing a state in which the blower and theduct are attached to the bracket.

FIG. 5 is a perspective view showing a state in which the duct isattached to the bracket.

FIG. 6 is a perspective view showing the bracket.

FIG. 7 is a top view showing a state in which a harness is attached tothe blower and the bracket.

FIG. 8 is a perspective view showing a seat cushion frame of the vehicleseat according to a first modification.

FIG. 9 is a top view showing the seat cushion frame of the vehicle seataccording to the first modification.

FIG. 10 is a top view showing a seat cushion frame of the vehicle seataccording to a second modification.

FIG. 11 is a top view showing a seat cushion frame of the vehicle seataccording to a third modification.

FIG. 12 is a front view showing a seat back frame of the vehicle seataccording to a fourth modification.

DESCRIPTION OF EMBODIMENTS

Hereinafter, a vehicle seat S according to an embodiment of the presentinvention (this embodiment) will be described with reference to thedrawings. The embodiments described below are given for mereillustration to facilitate understanding of the present invention, andare not intended to limit the present invention. That is, it should beunderstood that the shapes, dimensions, arrangements, and others of themembers described below can be changed and improved without departingfrom the spirit of the present invention, and equivalents thereof areincluded in the present invention.

Hereinafter, the vehicle seat S will be described as an example, but thevehicle seat S is mere illustration to facilitate understanding of thepresent invention, and is not intended to limit the present invention.That is, a seat provided with a blower 48 according to the presentinvention can be applied to a conveyance other than a vehicle, forexample, a ship, an aircraft, a machine with a seat, or the like.

In the following description, a front to back direction, a right to leftdirection, and an up to down direction correspond to respectivedirections viewed from a seat occupant in the vehicle seat S.

<Overall Configuration>

First, the overall configuration of the vehicle seat S according to thisembodiment, which is a conveyance seat according to the presentinvention, will be generally described with reference to mainly FIG. 1.FIG. 1 is a perspective view of the vehicle seat S according to thisembodiment.

The vehicle seat S mainly includes a seat back S1 and a seat cushion S2connected to the seat back S1. In addition, the vehicle seat S isconfigured such that cushion materials S1 z and S2 z are placed on theframe F constituting a framework portion and then are covered by coversS1 x and S2 x.

The seat back S1 includes a seat back frame 1 constituting a frameworkportion as described later.

The seat cushion S2 forms a seat portion that supports the buttocks ofthe seat occupant and includes a seat cushion frame 2 constituting theframework portion. The cover S2 x of the seat cushion S2 has four rightvent holes and four left vent holes S2 y. A blower 48 described later isdisposed in the interior of the seat cushion S2, and the air generatedfrom the blower 48 is sent to or near the thigh of the seat occupantthrough the vent holes S2 y.

<Frame>

Next, a frame F constituting a framework of the vehicle seat S will bedescribed with reference to FIGS. 2A and 2B. FIG. 2A is a perspectiveview of the frame F, and FIG. 2B is a perspective view showing a portionof the frame F, the portion constituting the seat cushion S2.

The frame F mainly includes the seat back frame 1 and the seat cushionframe 2 as shown in FIG. 2A.

As shown in FIG. 2A, the seat cushion frame 2 is attached on slide rails3 fixed to a vehicle body floor, and can be moved back and forth by theslide rails 3.

Additionally, as shown in FIG. 2B, the seat cushion frame 2 includes aback side connecting portion 40 disposed backward of the center, a frontside connecting portion 41 disposed forward of the center, and a panframe 42 disposed on the center side in the seat width direction.

The back side connecting portion 40 is linearly formed and extends inthe right to left direction at the back end portion of the seat cushionframe 2.

The front side connecting portion 41 is linearly formed and extends inthe right to left direction at the front end portion of the seat cushionframe 2.

The pan frame 42 is formed into a plate shape, and is joined to the backside connecting portion 40 and the front side connecting portion 41 bywelding with the pan frame 42 extending therebetween in a substantiallyhorizontal direction. The pan frame 42 has an opening 42 a through whichan end portion of a duct 49, as described later, on the outlet sideextends.

<Blower and Members Around Blower>

Next, the blower 48 and the members around the blower 48 will bedescribed with reference to FIGS. 3 to 7 in addition to FIGS. 1, 2A and2B. FIG. 3 is a sectional view showing the arrangement of the blower 48,a bracket 50 and the duct 49 in the seat cushion S2, showing a crosssection taken along the line III-III of FIG. 1. FIG. 4 is a perspectiveview showing a state in which the blower 48 and the duct 49 are attachedto bracket 50. FIG. 5 is a perspective view showing a state in which theduct 49 is attached to the bracket 50. FIG. 6 is a perspective viewshowing the bracket 50, and FIG. 7 is a top view showing a state inwhich the harness 51 is attached to the blower 48 and the bracket 50.

(Blower)

In the interior of the seat cushion S2, the blower 48 is provided as afan for generating air toward the buttocks of the seat occupant. Theblower 48 corresponds to a fan according to the present invention, andis provided below the pan frame 42.

As shown in FIG. 4, the blower 48 mainly includes a blower main body 48a provided at the center, an inlet portion 48 aa protruding backwardfrom the center, and an outlet portion (not shown) provided on the lowerside at the center.

Three protruding pieces 48 b protruding radially outward from the blowermain body 48 a are formed on the circumferential surface of the blowermain body 48 a at a predetermined distance. The blower 48 is disposed onthe bracket 50 such that the protruding pieces 48 b are placed onattachment protrusions 50 h of the bracket 50 as described later.Self-tapping screws 53 extend through through holes (not shown)extending in the up to down direction of the protruding pieces 48 b, andthe self-tapping screws 53 are screwed into the attachment protrusions50 h, whereby the blower 48 and the bracket 50 are fixed to each other.

Furthermore, the duct 49 as described later is connected to an outlet(not shown) located on the lower side of the blower 48, and is formedsuch that the air generated from the blower 48 flows to the thigh of theseat occupant through the duct 49, the cushion material S2 z, and thevent holes S2 y.

(Bracket)

In the seat cushion S2, the bracket 50 for disposing the blower 48 isattached to the pan frame 42.

As shown in FIG. 6, the bracket 50 mainly includes a flat, plate-shapedmain body portion 50 a formed at a position separated downward from thepan frame 42, attachment legs 50 b and 50 c serving as attachmentportions attached to the pan frame 42, and a fixing leg 50 e for fixingthe harness 51.

In the center portion of the main body portion 50 a, an opening 50 gextending therethrough in the thickness direction, through which theduct 49 described later extends, is formed. Thus, since the duct 49 isdisposed to extend through the opening 50 g of the bracket 50, thearrangement of the duct 49 is not restricted by the bracket 50.

Furthermore, three attachment protrusions 50 h protruding upward areformed on the side of the upper surface of the main body portion 50 a.The attachment protrusions 50 h are those for supporting the blower 48with a part of the protrusions extending through attachment holes (notshown) formed in the blower 48, and for receiving the self-tappingscrews 53 to screw the blower 48 and the bracket 50 together. Theattachment protrusions 50 h have a cylindrical shape with ribs formed onthe circumferential surface thereof.

In this way, the blower 48 is not directly fixed to the pan frame 42 andis attached to the attachment protrusions 50 h provided on the main bodyportion 50 a of the bracket 50 by the self-tapping screws 53. That is,since the blower 48 is attached to the pan frame 42 via the bracket 50,it is possible to prevent the vibration generated by the drive of theblower 48 from being transmitted to the seat occupant.

The attachment legs 50 b and 50 c are portions of the bracket 50 thatare attached to the pan frame 42, and extend upward continuously fromthe outer edge of the main body portion 50 a.

The fixing leg 50 e has a fixing hole 50 f extending therethrough in theup to down direction as shown in FIG. 7. The fixing hole 50 f functionsas a fixing portion that fixes the harness 51 connected to the blower48. Specifically, a clip 51 a is attached to the harness 51, and theclip 51 a is inserted into the fixing hole 50 f, whereby the harness 51is fixedly supported by the fixing leg 50 e. Thus, the fixing hole 50 ffor fixing the clip 51 a of the harness 51 is provided in the bracket50, whereby the harness 51 is easily and stably fixed to the bracket 50.

(Duct)

The duct 49 has a function of guiding the air generated by the blower 48upward of the pan frame 42 and is a cylindrical member formed in asubstantially J shape.

The duct 49 includes a flange 49 c provided at an end portion on theside of an air inlet and a bellows portion 49 a provided at an endportion on the side of an air outlet.

The flange 49 c is a portion interposed between a outlet port on thelower side of the blower 48 and the upper surface of the main bodyportion 50 a of the bracket 50. As can be seen from FIGS. 5 and 6, theflange 49 c is fixed to the bracket 50 by a self-tapping screw (notshown) with the flange being in contact with a periphery defining theopening 50 g of the bracket 50.

The bellows portion 49 a has a bellows shape that includes a protrusion49 aa formed to have substantially the same thickness and protrudingoutward, and a recess 49 ab formed continuously from the protrusion 49aa in a direction perpendicular to the pan frame 42 and recessed inward.

A portion of the bellows portion 49 a on the inner surface side wherethe protrusion 49 aa is formed on the outer surface side, that is, aportion of the bellows portion 49 a recessed on the inner surface side,is engaged with an annular lower end portion of the connecting member 52that has a shape widening toward the end.

Furthermore, the duct 49 is disposed so that the recess 49 ab overlapswith the opening 42 a of the pan frame 42 in the thickness direction ofthe pan frame 42. Since the duct 49 is disposed in this manner, theperiphery defining the opening 42 a enters the recess 49 ab of the duct49, and the duct 49 can be prevented from coming off the pan frame 42.

The connecting member 52 is a member that connects the cushion materialS2 z and the duct 49, and has a function of communicating holesconnected to the vent holes S2 y and formed in the cushion material S2 zand an end portion on the outlet side of the duct 49. As describedabove, the opening 42 a is formed in the pan frame 42, and theconnecting member 52 attached to the end portion on the outlet side ofthe duct 49 is arranged so as to protrude upward through the opening 42a.

In this way, since the opening 42 a is formed in the pan frame 42, theair generated from the bracket 50 can be sent upward of the pan frame 42through the duct 49, and the duct 49 can be compactly arranged withoutbeing inhibited by the pan frame 42. Furthermore, the blower 48 can becompactly attached in the seat cushion S2 provided with the pan frame42.

The pan frame 42 according to the embodiment is described as beingdisposed to extend between the front and back sides of the seat cushionframe 2 without covering the entire seat cushion frame 2, and, as shownin FIG. 2B, there is a space extending through in the up to downdirection in a portion on the right and left sides of the pan frame 42.However, the present invention is not limited to such a configuration,and the pan frame may be disposed to extend between the right and leftsides of the seat cushion frame, and be formed across the entirehorizontal area of the seat cushion frame.

<Seat Cushion Frame According to Modifications>

In the above embodiment, the seat cushion frame 2 fixed to the vehiclebody floor via the slide rail 3 is described as an example. However, thepresent invention is not limited to this, and a seat cushion frame fixedto the vehicle body floor by a mechanism different from the slide rail 3may be also possible. Specifically, a seat cushion frame 102 shown inFIGS. 8 and 9 may be applied. FIG. 8 is a perspective view showing theseat cushion frame 102 according to the modification, and FIG. 9 is aview showing the seat cushion frame 102 according to the modification asviewed from below.

(First Modification)

Hereinafter, the configuration of the seat cushion frame 102 of thevehicle seat S according to a first modification will be described withreference to FIGS. 8 and 9.

As shown in FIGS. 8 and 9, the seat cushion frame 102 according to thefirst modification includes a back side connecting portion 140 disposedbackward of the center, a front side connecting portion 141 disposedforward of the center, a pan frame 142 extending between the back sideconnecting portion 140 and the front side connecting portion 141. Asshown in FIG. 9, the back end portion of the pan frame 142 attached tothe back side connecting portion 140 is located below the level of thefront end portion of the pan frame 142 attached to the front sideconnecting portion 141.

Furthermore, as shown in FIGS. 8 and 9, a foot portion 143 formed bybending a pipe material into a substantially U shape is provided betweenopposite side portions of the seat cushion frame 102. The foot portion143 is rotatably supported by the opposite side portions of the seatcushion frame 102. The foot portion 143 rotates between a close positionclose to the vehicle body floor and a separated position separated fromthe vehicle body floor.

When the foot portion 143 is in the close position, the lower end of thefoot portion 143 is locked to a locking mechanism (not shown) attachedto the vehicle body floor, so that the seat cushion frame 102 is fixedto the vehicle body. When the lock by the lock mechanism is released,the foot portion 143 rotates from the close position to the separatedposition, so that the seat cushion frame 102 can be movable relative tothe vehicle body floor.

The pan frame 142 has an opening 142 a through which the end of the duct49 on the outlet side extends. First reinforcing portions 144 extendingin the front to back direction are formed on the right and left sides ofthe opening 142 a. The first reinforcing portions 144 are, for example,beads formed on the pan frame 142.

Thus, since the first reinforcing portions 144 are provided on oppositesides of the opening 142 a, it is possible to prevent a decrease inrigidity of an area around the opening 142 a.

Furthermore, since the first reinforcing portions 144 are provided, itis possible to enlarge the opening 142 a, thereby ensuring a sufficientamount of air from the blower 48.

Although not specifically shown in FIGS. 8 and 9, the blower 48 is alsoinstalled below the pan frame 142 in the seat cushion frame 102according to the first modification. The duct 49 extending from theblower 48, and the connecting member 52 connected to the duct 49 extendupward of the pan frame 142 through the opening 142 a. Thus, the airgenerated from the blower 48 and sent through the duct 49 is exhaustedfrom the vent holes Sty of the seat cushion S2 through the opening 142 aof the pan frame 142.

The above example in which the air is sent from the vent holes S2 y ofthe seat cushion S2 is described. However, the air may be sucked fromthe vent holes Sty of the seat cushion S2 toward the blower 48.

(Second Modification)

Next, the configuration of the seat cushion frame 102 of the vehicleseat S according to a second modification will be described withreference to FIG. 10.

In FIG. 10, the seat cushion frame 102 according to the secondmodification is different from the seat cushion frame 102 according tothe first modification in that the pan frame 142 is further providedwith second reinforcing portions 145. Hereinafter, differences from thefirst modification will be described.

As shown in FIG. 10, in the pan frame 142 according to the secondmodification, the first reinforcing portions 144 extending in the frontto back direction and the second reinforcing portions 145 extending inthe right to left direction are formed around the opening 142 a throughwhich the duct 49 extending from the blower 48 and the connecting member52 extend.

The second reinforcing portions 145 may be beads formed on the pan frame142 or may be wire members or plate members attached to the pan frame142.

In the case where the second reinforcing portions 145 are formed frommetal wire members, when the pan frame 142 is made of metal, the firstreinforcing portion 144 may be formed, for example, by welding metalwire members or plate members to the pan frame 142. In addition, whenthe pan frame 142 is made of resin, the first reinforcing portion 144may be formed, for example, by embedding metal wire members or platemembers in the pan frame 142.

In this way, since the opening 142 a, through which the connectingmember 52 extends, is surrounded by the first reinforcing portions 144and the second reinforcing portions 145, it is possible to furtherprevent a decrease in rigidity of an area around the opening 142 a.

Moreover, since the first reinforcing portion 144 and the secondreinforcing portion 145 are provided, it is possible to enlarge theopening 142 a, thereby ensuring a sufficient amount of air from theblower 48.

The duct 49 extending from the blower 48 is provided so as to extendalong the second reinforcing portion 145 in the right to left directionabove the pan frame 142. This enables the interference between the duct49 and the second reinforcing portions 145 to be prevented and thusfacilitates the attachment of the duct 49.

(Third Modification)

Next, the configuration of the seat cushion frame 102 of the vehicleseat S according to a third modification will be described withreference to FIG. 11.

The seat cushion frame 102 according to the third modification isdifferent from the seat cushion frame 102 according to the firstmodification in the configuration of the pan frame 142. Hereinafter, thedifferences will be described.

As shown in FIG. 11, the only one opening 142 a is formed in the panframe 142 according to the third modification. The duct 49 extendingfrom the blower 48, and the connecting member 52 connected to the duct49 extend through the opening 142 a.

Third reinforcing portions 146 are formed on the right and left sides ofthe opening 142 a. The third reinforcing portions 146 each include afirst straight portion 146 a, a curved portion 146 b, and a secondstraight portion 146 c.

The third reinforcing portions 146 may be formed as beads, or may beformed from wire members or plate members.

The first straight portion 146 a is a straight reinforcing portionformed forward of the opening 142 a. The first straight portion 146 aextends in the front to back direction and is formed so as to at leastpartially overlap the opening 142 a in the seat width direction.

The curved portion 146 b is a reinforcing portion connected to the backend of the first straight portion 146 a and curved along the opening 142a.

The second straight portion 146 c is a linear reinforcing portionconnected to the back end of the curved portion 146 b and formedbackward of the opening 142 a. The second straight portion 146 c extendsin the front-back direction and is formed so as to at least partiallyoverlap the opening 142 a in the seat width direction.

In the seat cushion frame 102 according to the third modification, thethird reinforcing portions 146 can be formed close to the opening 142 a.This enables the prevention of a decrease in rigidity of an area aroundthe opening 142 a.

Moreover, since the third reinforcing portions 146 are provided, it ispossible to enlarge the opening 142 a, thereby ensuring a sufficientamount of air from the blower 48.

(Fourth Modification)

Next, the configuration of the seat back frame 1 of the vehicle seat Saccording to a fourth modification will be described with reference toFIG. 12.

As shown in FIG. 12, in the seat back frame 1 according to the fourthmodification, a pan frame 242 is attached to the seat back frame 1, andthe duct 49 extending from the blower 48, and the connecting member 52connected to the duct 49 extend forward of the pan frame 242 through anopening 242 a formed in the pan frame 242.

Specifically, the seat back frame 1 includes an upper frame 1A and sideframes 1B attached to right and left ends of the upper frame 1A.

The pan frame 242 is attached to the upper frame 1A so as to extendbetween right and left sides of the upper frame 1A. For example, the panframe 242 may be attached to the upper frame 1A by welding, or may beattached by mechanical joint such as a bolt.

In the pan frame 242, a plurality of opening 242 a is formed. Theopenings 242 a are formed to be aligned in the right to left directionat the center of the pan frame 242 in the up to down direction.

Fourth reinforcing portions 244 extending in the right to left directionare formed above and below the openings 242 a. For example, the fourthreinforcing portions 244 may be formed as beads, or may be formed fromwire members or plate members.

Through the opening 242 a, the duct 49 extending from the blower 48, andthe connecting member 52 connected to the duct 49 extend forward of thepan frame 242. This connecting member 52 is connected to the cushionmaterial S1 z of the seat back S1.

Thus, the air generated from the blower 48 and sent through the duct 49is exhausted from the vent holes S1 y of the seat back S1 through theopening 242 a of the pan frame 242.

The above example in which the air is sent from the vent holes S1 y ofthe seat back S1 is described. However, the air may be sucked from thevent holes S1 y of the seat back S1 toward the blower 48.

In this way, since the pan frame 242 is attached to the seat back frame1 in accordance with the position of the vent holes Sly formed in theseat back S1, the duct 49 extending from the blower 48 can be easilyarranged.

Further, since the fourth reinforcing portions 244 are formed around theopening 242 a through which the connecting member 52 extends, it ispossible to prevent a decrease in rigidity of an area around the opening242 a.

Since the fourth reinforcing portions 244 are provided in this way, itis possible to enlarge the opening 242 a, thereby ensuring a sufficientamount of air from the blower 48.

REFERENCE SIGNS LIST

S: vehicle seat (conveyance seat)

-   -   S1: seat back        -   S1 x: cover        -   S1 y: vent hole        -   S1 z: cushion material    -   S2: seat cushion        -   S2 x: cover        -   S2 y: vent hole        -   S2 z: cushion material

F: seat frame

1: seat back frame

-   -   1A: upper frame        -   1B: side frame

2: seat cushion frame

3: slide rail

40: back side connecting portion

41: front side connecting portion

42: pan frame

-   -   42 a: opening

48: blower (fan)

-   -   48 a: blower body        -   48 aa: inlet portion    -   48 b: protruding piece

49: duct

-   -   49 a: bellows portion        -   49 aa: protrusion        -   49 ab: recess    -   49 c: flange

50: bracket

-   -   50 a: main body portion    -   50 b, 50 c: attachment leg (attachment portion)    -   50 d: fixing hole    -   50 e: fixing leg    -   50 f: fixing hole (fixing portion)    -   50 g: opening    -   50 h: attachment protrusion

51: harness

-   -   51 a: clip

52: connecting member

53: self-tapping screw

102: seat cushion frame

140: back side connecting portion

141: front side connecting portion

142: pan frame

-   -   142 a: opening

143: foot portion

144: first reinforcing portion

145: second reinforcing portion

146: third reinforcing portion

-   -   146 a: first straight portion    -   146 b: curved portion    -   146 c: second straight portion

150: bracket

242: pan frame

-   -   242 a: opening

244: fourth reinforcing portion

1. A conveyance seat, comprising: a seat cushion, and a fan provided inthe seat cushion, wherein the seat cushion is provided with aplate-shaped pan frame, the fan is provided below the pan frame, a ductis connected to the fan, and an opening through which the duct extendsis formed in the pan frame.
 2. The conveyance seat according to claim 1,wherein the duct has a bellows shape including a recess and a protrusionthat are formed continuously in one direction, and the recess of thebellows shape is arranged so as to overlap the opening of the pan framein the one direction.
 3. The conveyance seat according to claim 1,further comprising a bracket for disposing the fan in the seat cushion;wherein the bracket includes a main body portion formed at a positionseparated from the pan frame with the bracket being attached to the panframe, and attachment portions attached to the pan frame, and the fan isattached to the main body portion of the bracket.
 4. The conveyance seataccording to claim 3, wherein an opening through which the duct extendsis formed in the bracket.
 5. The conveyance seat according to claim 3,wherein a harness is connected to the fan, a clip is attached to theharness, and a fixing portion for fixing the clip is provided in thebracket.